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05-21 Acceleration is Special

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    Well, how hard we push definitely matters.
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    If I push really hard, the cart could accelerate really fast.
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    The mass of the cart also matters.
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    It's much harder to get a very massive cart, a heavy cart, moving than it is to get a light cart.
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    The color, of course, doesn't matter,
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    and the material it turns out doesn't matter either.
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    You might have thought that a lightweight material, well, maybe that will accelerate faster.
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    But then we're changing two variables.
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    You'd be changing both the material and the mass of the cart.
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    When we're thinking in terms of designing an experiment,
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    we want to make sure that the variables we alter we're altering in isolation.
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    If I have two carts that are the same mass, it doesn't matter what the material is made of.
Title:
05-21 Acceleration is Special
Video Language:
English
Team:
Udacity
Project:
PH100 - Intro to Physics
Duration:
0:38
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